Hair fastener



FIG. 1 is a perspective view of a hair fastener showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is an enlarged left side view thereof;

FIG. 5 is an enlarged right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a perspective view of the hair fastener in a configuration of use. 

The ornamental design for a hair fastener, as shown and described. 